test(backend): APIテストの復活 (#10163)

* Revert 1c5291f818

* APIテストの復活

* apiテストの移行

* moduleNameMapper修正

* simpleGetでthrowしないように

status確認しているので要らない

* longer timeout

* ローカルでは問題ないのになんで

* case sensitive

* Run Nest instance within the current process

* Skip some setIntervals

* wait for 5 seconds

* kill them all!!

* logHeapUsage: true

* detectOpenHandlesがじゃましているらしい

* maxWorkers=1?

* restore drive api tests

* workerIdleMemoryLimit: 500MB

* 1024MiB

* Wait what

packages/backend/src/GlobalModule.ts

@@ -1,3 +1,4 @@
+import { setTimeout } from 'node:timers/promises';
 import { Global, Inject, Module } from '@nestjs/common';
 import Redis from 'ioredis';
 import { DataSource } from 'typeorm';
@@ -57,6 +58,14 @@ export class GlobalModule implements OnApplicationShutdown {
 	) {}
 
 	async onApplicationShutdown(signal: string): Promise<void> {
+		if (process.env.NODE_ENV === 'test') {
+			// XXX:
+			// Shutting down the existing connections causes errors on Jest as
+			// Misskey has asynchronous postgres/redis connections that are not
+			// awaited.
+			// Let's wait for some random time for them to finish.
+			await setTimeout(5000);
+		}
 		await Promise.all([
 			this.db.destroy(),
 			this.redisClient.disconnect(),